Filtra

Russian Centre of Education (Arkhangelsk / Northwestern Federal District / Russia)
Nevsky Institute of Language & Culture (San Pietroburgo / Northwestern Federal District / Russia)
INTEX (Surgut / Ural Federal District / Russia)
Lenda - Center (San Pietroburgo / Northwestern Federal District / Russia)
CompLang (Mosca / Central Federal District / Russia)
Delta - Intercontact (Tver' / Central Federal District / Russia)